Sort #includes per style(9)

No functional change

MFC after:	3 days

contrib/bsnmp/snmpd/action.c

@@ -38,12 +38,12 @@
 #include <sys/sysctl.h>
 #include <sys/un.h>
 #include <sys/utsname.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
 #include <ctype.h>
 #include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <syslog.h>
 
 #include "snmpmod.h"